@article{ZVMMF_1975_15_1_a8,
     author = {G. M. Vainikko},
     title = {The convergence of the difference method in the problem of periodic solutions of ordinary differential equations},
     journal = {\v{Z}urnal vy\v{c}islitelʹnoj matematiki i matemati\v{c}eskoj fiziki},
     pages = {87--100},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/ZVMMF_1975_15_1_a8/}
}